Multiscale modelling of additively manufactured Ti-6Al-4V alloy: Fatigue performance evaluation from material to structural level

Chi, Weiqian; Wang, Wenjing; Zhou, Hongchang et al.

International Journal of Fatigue, 2025, 201, 109181

Number of Access:28（2025-11-25 07:51 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/102782

Link to primary information 

File Format Terms of use Size Views Date.Available Description information
IntJFatigue_201 pdf None 23.6 MB 75 2025.09.26  
Creative Commons : Attribution

Item Information

Output File Export EndNote Basic Export Mendeley

Title
Multiscale modelling of additively manufactured Ti-6Al-4V alloy: Fatigue performance evaluation from material to structural level
Creator
CreatorName
Chi, Weiqian
CreatorName
Wang, Wenjing
ORCID
0000-0002-2936-644X 0000-0002-2936-644X
researchmap permalink
zhou.hongchang zhou.hongchang
CreatorName
Zhou, Hongchang
CreatorName
Yan, Ruiguo
NRID
1000040397758 1000040397758
ORCID
0000-0002-7685-3152 0000-0002-7685-3152
researchmap permalink
read0134237 read0134237
Scopus Author ID
35318208400 35318208400
CreatorName
Mikami, Yoshiki
Subject
Fatigue behaviour
Hot Isostatic Pressing
Multiscale simulations
Structure-property relationship
Titanium alloy
Description
Chi W., Wang W., Zhou H., et al. Multiscale modelling of additively manufactured Ti-6Al-4V alloy: Fatigue performance evaluation from material to structural level. International Journal of Fatigue 201, 109181 (2025); https://doi.org/10.1016/j.ijfatigue.2025.109181.
Abstract
Additively manufactured (AM) Ti-6Al-4V alloys face limitations in critical applications due to uncertainties in their fatigue performance. Despite extensive research on fatigue life prediction, the discrepancies in fatigue behaviour between AM structural components and material-level specimens remain poorly understood. In this study, the effect of hot isostatic pressing (HIP at 920 °C, 1000 bar Ar, 2 h) on the fatigue properties at both material and structural levels was investigated, aiming to bridge the gap in the cross-scale fatigue behaviour of AM Ti-6Al-4V alloys. Although HIP significantly improved microstructure and fatigue performance of material-level specimens, the presence of larger near-surface defects remained in the structural components, resulting in a poorer fatigue resistance. To quantitatively evaluate the impact of near-surface defects, a novel multiscale model for predicting fatigue behaviour of AM Ti-6Al-4V alloys was proposed. The model integrates finite element analysis with microstructural characteristics, where the grain boundaries (GBs) effect was quantified by the distance between GBs and the misorientations between adjacent grains. The input of this model requires only test conditions, tensile properties and microstructural information of the materials. The model was validated using S-N data from axial fatigue tests at both the material and structural levels, showing excellent correlation between predicted and experimental results. Overall, this study enhances the understanding of the relationship between processing techniques, microstructure and fatigue performance in AM alloys. Furthermore, it provides a multiscale analysis framework that integrates microstructural, material and structural information, offering a basis for the accurate prediction and design of fatigue-resistant AM components.
Publisher
Elsevier Ltd
Source Title
International Journal of Fatigue
Volume (Issue)
201
Page
109181
Date of Issued
2025-12-01
Language
English
Handle URL
https://hdl.handle.net/11094/102782
PISSN
01421123
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.ijfatigue.2025.109181
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
© 2025 The Authors
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article